Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A driving method for an in-cell touch display, the in-cell touch display comprising an in-cell touch panel, the in-cell touch panel comprising scan lines and touch sensors, the driving method comprising the steps of: dividing a frame period into N display/touch detection sub-periods each comprising a display sub-period and a touch detection sub-period; dividing the touch sensors into M touch sensor sets, wherein a position of each of the touch sensor sets corresponds to neighboring ones of the scan lines; supplying a display common voltage to the touch sensor corresponding to the I th touch sensor set when the scan line being scanned in the display sub-period of the K th display/touch detection sub-period comprises the scan line corresponding to the I th touch sensor set, wherein N, M, K and I are natural numbers, K is smaller than or equal to N, and I is smaller than or equal to M, wherein the step of supplying the display common voltage to the touch sensor corresponding to the I th touch sensor set when the scan line being scanned in the display sub-period of the K th display/touch detection sub-period comprises the scan line corresponding to the I th touch sensor set comprises: providing a common voltage look-up table, which records a relationship between an index number of the display/touch detection sub-period and the touch sensor set; and supplying the display common voltage to the corresponding touch sensor set according to the operating display/touch detection sub-period and the common voltage look-up table.
The invention relates to a driving method for an in-cell touch display, which integrates touch sensors within the display panel to reduce thickness and cost. The method addresses the challenge of minimizing interference between display driving and touch detection, ensuring accurate touch sensing without degrading display performance. The display panel includes scan lines and touch sensors, which are divided into multiple touch sensor sets. Each set corresponds to neighboring scan lines. The method divides a frame period into multiple display/touch detection sub-periods, each consisting of a display sub-period and a touch detection sub-period. During the display sub-period, a display common voltage is supplied to the touch sensors in a specific set when the scan lines being driven correspond to that set. This is controlled using a common voltage look-up table, which maps the display/touch detection sub-period index to the appropriate touch sensor set. The method ensures synchronized display and touch operations, reducing crosstalk and improving touch accuracy. The look-up table dynamically adjusts the common voltage supply based on the current sub-period, optimizing performance across different touch sensor sets. This approach enhances the efficiency and reliability of in-cell touch displays by coordinating display and touch functions within the same panel structure.
2. The driving method according to claim 1 , wherein the step of supplying the display common voltage to the touch sensor corresponding to the I th touch sensor set when the scan line being scanned in the display sub-period of the K th display/touch detection sub-period comprises the scan line corresponding to the I th touch sensor set comprises: acquiring an index number of the scan line scanned upon displaying before the display sub-period of the K th display/touch detection sub-period; judging the touch sensor set corresponding to the scan line being scanned according to the acquired index number of the scan line before the display sub-period of the K th display/touch detection sub-period; and supplying the display common voltage to the touch sensor corresponding to the touch sensor set.
This invention relates to a driving method for a display device with integrated touch sensing functionality, addressing the challenge of efficiently coordinating display and touch detection operations. The method involves dividing each frame period into multiple display/touch detection sub-periods, each containing a display sub-period and a touch detection sub-period. During the display sub-period of a given sub-period (K), the method supplies a display common voltage to touch sensors corresponding to a specific touch sensor set (I) based on the scan line being driven. The method first acquires the index number of the scan line that was scanned during the previous display sub-period. Using this index, it determines which touch sensor set corresponds to the scan line being scanned in the current display sub-period. The display common voltage is then supplied to the touch sensors within that identified set. This approach ensures that touch sensors are properly driven during display operations, preventing interference and improving touch detection accuracy. The method dynamically adjusts the touch sensor driving based on the scan line index, optimizing the integration of display and touch functions in a shared panel architecture.
3. A mobile device, comprising: an in-cell touch panel, comprising scan lines and touch sensors; and an display-driving and touch integrated circuit, comprising a plurality of pins which respectively coupled to the scan lines and the touch sensors, wherein a frame period is divided into N display/touch detection sub-periods each comprising a display sub-period and a touch detection sub-period, wherein the touch sensors is divided into M touch sensor sets, wherein a position of each of the touch sensor sets corresponds to neighboring ones of the scan lines; wherein a display common voltage is supplied to the touch sensor corresponding to the I th touch sensor set when the scan line being scanned in the display sub-period of the K th display/touch detection sub-period comprises the scan line corresponding to the I th touch sensor set, wherein N, M, K and I are natural numbers, K is smaller than or equal to N, and I is smaller than or equal to M, wherein the display-driving and touch integrated circuit further comprises: a common voltage look-up table, which records a relationship between an index number of the display/touch detection sub-period and the touch sensor set, wherein the display-driving and touch integrated circuit supplies the display common voltage to the corresponding touch sensor set according to the operating display/touch detection sub-period and the common voltage look-up table.
This invention relates to mobile devices with integrated display and touch functionality, specifically addressing the challenge of efficiently managing display and touch operations within a single frame period. The device includes an in-cell touch panel with scan lines and touch sensors, and an integrated circuit that drives both display and touch functions. The frame period is divided into multiple display/touch detection sub-periods, each consisting of a display sub-period and a touch detection sub-period. The touch sensors are grouped into multiple sets, each corresponding to neighboring scan lines. During the display sub-period of a given sub-frame, a display common voltage is supplied to the touch sensor set associated with the currently scanned scan line. The integrated circuit uses a common voltage look-up table to determine which touch sensor set receives the display common voltage based on the current sub-period and the corresponding scan line. This approach ensures synchronized display and touch operations, improving efficiency and reducing interference between the two functions. The look-up table dynamically maps sub-periods to touch sensor sets, optimizing voltage distribution and enhancing touch detection accuracy. The system avoids conflicts by coordinating voltage supply timing with scan line activation, ensuring reliable performance in mobile devices with integrated touch and display panels.
4. The mobile device according to claim 3 , wherein an operation of the display-driving and touch integrated circuit in the display sub-period of the K th display/touch detection sub-period comprises: the display-driving and touch integrated circuit acquiring an index number of the scan line scanned upon displaying before the display sub-period of the K th display/touch detection sub-period; the display-driving and touch integrated circuit judging the touch sensor set corresponding to the scan line being scanned according to the acquired index number of the scan line before the display sub-period of the K th display/touch detection sub-period; and the display-driving and touch integrated circuit supplying the display common voltage to the touch sensor corresponding to the touch sensor set.
This invention relates to mobile devices with integrated display-driving and touch detection functionality, specifically addressing the challenge of efficiently managing touch sensing during display operations. The technology involves a display-driving and touch integrated circuit that coordinates display updates and touch detection in synchronized sub-periods. During a display sub-period of a given display/touch detection cycle, the circuit first identifies the scan line currently being driven for display purposes. Based on the scan line's index number, the circuit determines which set of touch sensors corresponds to that scan line. The circuit then supplies a display common voltage to the touch sensors in that set, ensuring proper touch detection while minimizing interference with display operations. This approach optimizes the integration of display and touch functions, reducing power consumption and improving responsiveness. The invention is particularly useful in mobile devices where efficient use of hardware resources is critical.
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February 11, 2020
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